Antidepressant drugs tend to work best for pain associated with nerve damage.

These drugs used to treat flu symptoms tend to be high in sugar.

Over-the-counter drugs tend to be less effective than prescription drugs.

The drug tends to "stick" to the surface of new blood vessels.

In addition, antidepressant drugs tend to lose efficacy over the course of treatment.

The older drugs tended to release water, which broke down the artemisinin.

New ones are still being sought because the current drugs tend to cause movement disorders and other side effects.

As in the case of primary sufferers, these drugs tend to be significantly over-prescribed.

The newer drugs tend to have fewer side effects.

"Alcohol and drugs tend to keep you from taking walks," he said while in New York.